Alright, let's work through 4994 times 4236 step by step
4994 × 4236 = 4236 × (4994)
+ 4236 × 4 producing 16944
+ 4236 × 90 yielding 381240
+ 4236 × 900 what gives us 3812400
+ 4236 × 4000 that equals 16944000

= 21154584
